Apparatus for spinning sheet metal.



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' R I c L A R K E I r APPARATUS FOR SPINNING SHEET METAL.

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I T N E S 8 E S l N V E N T OR PATENTBD FEB. 5, 1907.

R. CLARKE. APPARATUS FOR SPINNING SHEET METAL.

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M a N m u m 1 m /M s r Willi"! PILIOATION- ILBD 111N31 195- WITNESSES UNITED STATES PATENT ornron.

RALPH CLARKE, OF NEW CASTLE, PENNSYLVANIA, ASSIGNOR OF ON E-HALF TO NEW CASTLE STAMPING COMPANY, OF NEW CASTLE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application filed June 12, 1905. Serial No. 284.758.

To all whom it may concern:

Be it known that I, RALPH CLARKE, of New Castle, Lawrence county, Pennsylvania, have invented a new and useful Apparatus for Spinnin Sheet Metal, of which the following is a i ull, clear,'and exact description,

reference being had to the accbmpanyi'ng' drawings, forming part of. this specification, in which- Figure 1 1s a sectlonal side elevation showing apparatus constructed'in accordance with Heretoforc in the spinning of such. articles sectional mandrels have been employed, the article being spun to final form over the sectional mandrel, which Was then collapsed and taken out section by section through the narr'owenmouth of the article. This method was objectionable, not only on account of the great weight of the mandrel and the delay necessary in inserting the mandrel and placarrangement of the more fully described, and set forth in the 4'5 ing it in the lathe, but also on account of the liability of forming longitudinal marks or creases in the article along the joints of the sections of the mandrel and, further, the frequent cracking and breaking of the metal.

My invention does away with the use of sectional mandrels and provides a sectionalbottom in combination with a forming-roller, which is eccentrically located relative to the center of thearticle. It also does away with the offsetting of the tail stock'relative to the head-stock of the lathebyijproviding a stem which is eccentrically located relative to the axis of the-forming-roller. i

It further consists in the construction and parts, as hereinafter claims. I

In the-drawings, referring to Fig. 1', 2 is the head-stock, and 3 the tail-stock, of the spinning-lathe, the head-stock having the hold ing chuc'k 4..- -5 is the first. forming-roller which I have shown as revolubly mounted upon the stem 6,--. having the enlarged disk 7 at one end and the bearing d-isk'8 at the other end. The bearing-'diskis provided with an ation thepartly-spun blank is sli the roller 14 (shown in Fi 2,) whic is carried eccentric stem 9, which is preferably of conical form fitting into a corresponding recess in the tail-stock. The disk 7 is referably rovided-with a pin or stem it), w 'ch is in a inement with stem 9 and fits Within a late 1 1, which in turn fits within the sectiona bot tom 12. This bottom 12 is made up of a plurality of pieces, four in the present case, preferab y divided on radial lines. The central portion of this sectional bottom is recessed to receive the plate 11, which is referably flush with the bottom when in p ace.' I preferably rovide ball-bearin s between the disks 7 an 8 and the ends of t e forming-roller, as indicated at 13..

In carrying out the first step of the operation the bottom plate 12 is fitted within the bottom of the article, and ,the plate 11 is slipped into position to hold the sectional bottoni in place. The roller-stem 9 being held in the tail-stock of the lathe, the blank,

with its contained bottom, is slipped over the roller 'until the pin 10 enters the recess in the plate 11. The tail-stock is then moved forward until the blank is forced into the chuck of the head-stock. .The' head-stock is then rotated and the metal is spun in the ordinary manner, beginning preferably at the bottom and working the metal down to fit the contour of the roller. Thebottom art of the article is preferably spun to'final orm in this first step. The tail-stock is preferably moved laterally to release the roller from the 1 side of the vessel and is then moved endwise to pull the roller, together with the plug 10,

out of the spun. vessel. In my preferred method a series of blanks arethus partly spun to an intermediate shapebetween the original shape and the final. A series of the bottoms is preferably provided,- so that the blanks may be prepared by puttin in the bottom, and one may be ut on the athe as soon as the partly-spun b ank is taken ofi.

In carrying out the second step of the operped over upon the tail-stock of t e same or another lathe in the same manner as the first roller. The plate of this second roller fits into the circ-u ar recess in the sectional bottom plate 12, and as the roller is of smaller diameter in its base portion than the first roller I prefer- 10 ably offset the stem 1 as shown at 17. This 5 I spaces the disk 18 a art from the base of the article and brings the pinlQ in-line or substantially in line with the stem 9. The re cessed portion of the roller 14 is thus brought within the upper portion of the partly-spun article, and thls upper portion or the article is then spun into such portion to narrow the n u per part and shape it to its final form.

is shaped in the second operation.

'I e mouth, however, of the article is still large enough so that the inner or base portion'ofthe roller 14 and the sectional bottom 12 may be drawn out through it. The roller is withdrawn in the same manner as before, and aseries ofarticles are thusspun from the partially-formed shapeinto the desired shape.

, The first spinning operation preieralby com.-

pletes the form of the base portion of the article, while its upper portion near the mouth This may be varied, however, as desired. After the blank has been spun to the final shape the upper portion 1) of the article is cut off, thus giv- In in the present case a tea-kettle.

lhe advantages of my invention result from the use of the sectional bottom in co1n bination with the eccentric former, which is. preferably in the form ol a roller, thus doing away with. the use of the heavy sectional mandrels heretofore employed. B using two vo r.more successive formers of ifl'erent shape I can .narrow the mouth and at the same time withdraw the former without of cracking the metal.

using a sectional former. The blank maybe annealed between the successive s inning operations, if desired, to reduce the iability By usingtlie sectional bottom with the eccentric mandrel the vention illustrated and described may be made within the scope of the claims without departing from the spirit of the invention or sacrificing any of its advantages.

I claim i 1. In spinning apparatus, a sectional bottom, in combinationwith an eccentric former scribed.

2. In spinnin a aratus, a sectional bottom, means for lioiding the bottom sections the stem and engaging "nent bearing cooperating therewith, substantially as dein place, and aneecentric forming-roller co.- operating therewith; substantially as described.

3. In spinning apparatus, a sectional bottom, and an eccentric forming-roller having an end bearing supported in said bottom;

substantially as described.

4. In spinning apparatus, a sectional bot-' tom having a central plate interfitting with the sections, and an eccentric roller having an inner end bearing supported in the bottom; substantially as described.

5. In spinning apparatus, a sectional bottom having a center sup ort, and an eccentric roller having a bearing carried'on said central support ;.substantially as described.

6. In spinning apparatus, a sectional bot- .tom plate having .a central removable plug,

an eccentric roller having an inner bearing coacting with the plug, and an outer bearing for the roller having a stem in alinement with the bottom plug; substantially as described;

7. In spinning apparatus, an eccentric forming-roller, a disk bearing against the u per end of said roller, and a stenreclcentrical y mounted upon-said disk, substantially as described.

8. In spinning apparatus, an eccentric forming-roller, a bearing-disk at each-end of said forming-roller, and a stem'eccentrically mounted'on one of said disks, substantially as described. I

v 9. In spinning apparatus, a sectional bottom having'a central recess, a central plate fitted flush into said recess, and an eccentric t'ormingroller having an end bearing-supported. b the central plate, substantially-as describe 10. Forming mechanism for spinning apparatus comprising a stem, a forming-roller journaled thereon, bearing-plates earned by the ends of the roller, and journals carried by the bearing-plates eccentric with respect to the stem.

11. Forming mechanism for spinning apparatus comprising'a stem having a permalate at one-end, a formingroller journale upon the stem and enga ing the bearinglate, a removable bearing-plate carried by t 1e 0 posite end of the stem and bearing against t e adjacentend of the roller, and journals upon the'bearmg-plates eccentric to the stem.

In testimony whereof I have hereunto set 'myhand.

' v RALPH CLARKE. Witnesses:

LEE M. RANER, L. A. J OHNSTQN. 

